SiTime SIT5359AC-FR-33VT-100.000000

The SiT5359 is a precision MEMS Super-TCXO with stability optimized to ±50 ppb over the -40°C to 105°C temperature range. It is designed for optimal dynamic performance and is well-suited for high-reliability telecom, wireless and networking, industrial, precision GNSS, and audio/video applications.

Leveraging SiTime's unique DualMEMS temperature sensing and TurboCompensation technology, the SiT5359 delivers optimal dynamic performance for timing stability in the presence of environmental disturbances such as airflow, temperature perturbations, vibration, shock, and EMI. The device also integrates multiple on-chip voltage regulators to filter power supply noise, eliminating the need for dedicated external LDOs.

The SiT5359 is offered in three device configurations, orderable via ordering code:

1. TCXO with a non-adjustable output frequency;
2. VCTCXO allowing voltage-controlled output frequency adjustment;
3. DCTCXO supporting digital control of output frequency via I²C interface, with frequency adjustment resolution down to 5 ppt (parts per trillion).

The SiT5359 can be factory-programmed for any combination of frequency, stability, voltage, and pull range. This programmability enables designers to optimize clock configurations while eliminating the long lead times and customization costs associated with quartz devices, where each frequency requires a custom part.

Refer to the Manufacturing Guidelines for the correct reflow profile and PCB cleaning recommendations to ensure optimal performance.

• Output frequency range: 60.000001–189 MHz and 208–220 MHz, 1 Hz step size
• Factory-programmable options, short lead time
• Optimal dynamic stability under airflow and thermal shock conditions
• Stability of ±50 ppb over -40°C to 105°C temperature range
• Typical frequency slope (ΔF/ΔT) of ±1 ppb/°C
• Allan deviation (ADEV) of 1.5e-11 at 10-second averaging time
• No activity dips or micro-jumps
• Resistant to shock, vibration, and board flex
• On-chip voltage regulator eliminates external LDO
• Digital frequency adjustment via I²C (DCTCXO)
• Digital control of output frequency and adjustment range
• Adjustment range up to ±3200 ppm
• Frequency adjustment resolution down to 5 ppt
• Supply voltage: 2.5 V, 2.8 V, 3.0 V, and 3.3 V
• LVCMOS output
• RoHS and REACH compliant
• Lead-free, halogen-free, antimony-free

4G/5G radio, small cell, IEEE 1588 boundary and grandmaster clocks, carrier-grade routers and switches, synchronous Ethernet, optical transport (SONET/SDH, OTN, Stratum 3), DOCSIS 3.x remote PHY, GPS-disciplined oscillators, precision GNSS systems, test and measurement